doxy: update documentation and config.
doxy: update documentation and config.

Almost only new config vars, some vars are removed.
No config change in this huge commit, as seen here

get all diff without context, remove comment, remove file name, get only deletions.

git diff -U0 | grep -v \# | grep -v \@ | grep  -
diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
--- a/doc/Doxyfile.in
-
-
-SYMBOL_CACHE_SIZE      = 0
-
-                         *.d \
-                         *.idl \
-                         *.odl \
-                         *.php3 \
-                         *.dox
+MATHJAX_FORMAT         = HTML-CSS
-XML_SCHEMA             =
-XML_DTD                =
-XML_PROGRAMLISTING     = YES
-PERL_PATH              = /usr/bin/perl
-MSCGEN_PATH            =

just the USE_MDFILE tag has been moved

Zouch/Radium-Engine,Zouch/Radium-Engine,AGGA-IRIT/Radium-Engine,AGGA-IRIT/Radium-Engine